7-String Guitar Chord Chart and Tabs in Alex Tuning

Do7b9
Notes: Do, Mi, Sol, Si♭, Re♭
x,x,10,10,9,11,9 (xx23141)
x,10,10,x,9,11,9 (x23x141)
10,10,x,x,9,11,9 (23xx141)
10,x,x,10,9,11,9 (2xx3141)